Crossbow stock adaptor plate



FIG. 1 is a rear-right perspective view of a crossbow stock adaptor plate, showing my new design;

FIG. 2 is a right side view thereof; and,

FIG. 3 is a left side view thereof.

The broken line in the drawings depicts unclaimed environment and portion of the adaptor plate only and forms no part of the claimed design. 

CLAIM The ornamental design for a crossbow stock adaptor plate, as shown and described. 